Having a famous father is not always easy: the burden of expectation can weigh heavily on young shoulders. So what to do when your surname is Bin Laden?

In an interview with the New Statesman, Omar bin Laden, the fourth eldest son of the world's most wanted man, reveals himself as someone definitely not cut from the same cloth as his father.

Asked whether he plans to enter politics or public life, Omar says: "I do not believe that I would be a good politician – I have a habit of speaking the truth, even when it does not serve me well. But I would like to be in a position to promote peace. I believe that the United Nations would be ideal for me."

Omar ended contact with his father, Osama bin Laden, in April 2001. He says he was asked once to take up arms at a meeting with his father's fighters.

"His sons were in attendance, although none of us was a fighter," Omar says. "He spoke of how it is a great honour to give one's life for Islam and said anyone who wanted to give their life should put their name on a paper in the mosque.

"He never asked me to join al-Qaida, but he did tell me I was the son chosen to carry on his work. He was disappointed when I said I was not suited to that life. I do not like disagreement or violence."

As for his memory of the 11 September 2001 attacks in America that have made the Bin Laden name infamous, Omar says he was staying in the home of his father's mother in Jeddah at the time.

"I had been sound asleep and was woken by my uncle yelling: 'Look what your father has done!'.

"I went into the sitting area and my family were gathered around the television. I soon learned that America was under attack. It was a very sad day." Omar, however, does not believe at that point that his father was behind the attack.

"I did not agree with my uncle's reaction. I never thought my father was capable of the carnage in America – it was too big for his small organisation.

"I cannot speak for my father's family. This topic is too painful for us to talk about. We were all so shocked by the suffering of those poor people that, after that morning, none of us ever had a conversation about it."

In the book, he goes on to say that while he initially refused to believe that his father was involved in the attack on the World Trade Center in New York, this view eventually changed: "Only much later, when he took personal credit for the attacks, did I know I must give up the luxury of doubt. That was the moment to set aside the dream that I had indulged, feverishly hoping that the world was wrong and it was not my father who brought about that horrible day. After hearing an audiotape of my father's own words taking credit for the attacks, I faced the reality that he was the perpetrator behind the events of September 11, 2001. This knowledge drives me into the blackest hole.

In his New Statesman interview, Omar says he does not seem to have suffered unduly for bearing the Bin Laden name. He says people are courteous once they have overcome their initial reaction.

"People are surprised when they learn that I am the son of Osama bin Laden. But once they get their wits in order, they are curious about my life and usually extend a hand of friendship, which leads me to believe that most people have very good hearts."

In the book, which was published last month by St Martin's Press, Omar reveals the conflicting emotions he holds for his father.

"Although I cannot simply order my heart to stop loving my father, I do not agree with his behaviour," he writes.

"There are times that I feel my heart swell with anger at his actions, which have harmed many people, people he did not know, as well as members of his own family.

"As the son of Osama bin Laden, I am truly sorry for all the terrible things that have happened, the innocent lives that have been destroyed, the grief that still lingers in many hearts."